Telefonaktiebolaget Lm Ericsson (publ)

Dino Pjanic

Fredrik Saarnak

Waqas Nawaz Khan

Gabriel Cercel

Sergio Almansa-Valverde

André Nyberg

Andres Reial

Fredrik Tufvesson

Juan Serrato Vital

Mariell Eriksen

Harsh Tataria

There is provided mechanisms for transmission of MU-MIMO signals. A method is performed by a network node. The method includes obtaining parameter values of statistics of co-scheduled user equipment served by the network node. The statistics at least pertains to mobility of each of the user equipment. The method includes dynamically selecting a multi-user transmission configuration from candidate multi-user transmission configurations. Each candidate multi-user transmission configuration specifies at least a digital precoding mode selected from candidate digital precoding modes and an analog beam steering mode selected from candidate analog beam steering modes. The multi-user transmission configuration is selected according to the parameter values and a configured mapping of the parameter values to the candidate multi-user transmission configurations. The method includes transmitting the MU-MIMO signals towards the user equipment using the selected multi-user transmission configuration.

Transmission of MU-MIMO signals

The present disclosure relates to methods and arrangements for dynamically configuring repeated transmission of random access response messages from an access node, wherein the random access response message is repeatedly transmitted in response to receipt of a random access request from wireless device operating in a coverage enhancement, CE, mode and wherein the random access response message is configured for repeated transmission on a downlink channel using a repetition level selected from a set of repetition levels associated with a CE level of the CE mode. The repetition level represents a predetermined number of repeated transmissions and the CE level represents a group of wireless devices with similar radio conditions. The method comprises determining, for a predetermined data set, a ratio of successful to initiated random access attempts when applying a selected repetition level of the set of repetition levels for repeated transmission of the random access response messages on the downlink channel, wherein a random access attempt is counted as successful responsive to receipt of a first uplink transmission on a packet uplink shared channel, PUSCH. The method further comprises selecting an operational repetition level of the set of repetition levels for repeated transmission of random access response messages on the downlink channel based on the determined ratio.

Dynamic estimation of random access response repetitions

A method performed in a network node for identifying UEs which are non-compliant with modified CRS operation. The network node enables CRS operation according to a first configuration for a first period. The network node analyzes Information Elements (IE) in RRC Connection Re-establishment Request messages received from UEs during the first period. The network node generates a first set containing identities of UEs whose values in reestablishmentCause IE in the RRC Connection Re-establishment Request messages received during the first period are 'otherFailure'. When the first period is finished, the network node enables CRS operation according a second configuration different from the first configuration for a second period. The network node analyzes IE in RRC Reestablishment Request messages received from UEs during the second period. The network node generates a set containing identities of non-compliant UEs based on the first set and analyzing IE in the RRC Reestablishment Request messages received during the second period.

Network node and method for identifying user equipment non-compliant with modified CRS operation in wireless communication network

A network node assigns a transmission parameter, e.g., an Antenna Port Identifier (APID) and a Scrambling Code Identifier (SCID) combination, to each of a plurality of wireless devices responsive to the channel correlations between each pair of wireless devices formed from the plurality of wireless devices, to facilitate the transmission of data from the network node to each wireless device. Such intelligent transmission parameter assignment reduces interference and/or improves throughput.

Transmission parameter assignment for MU-MIMO wireless devices

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Malmö, Sweden

Dino Pjanic